Crusher



Patented Jan. 30, 1923.

HAROLD M. PLAISTED, OF ST. LOUIS, MISSOURI, ASSIGN'OR TO WILLIAMS PATENT CRUSHER 8a PULVERIZER COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI. 1

Application filed May 13,

T all whom it may camera Be it known that I, HAROLD M. PLAISTED, a citizen of the United States, residing at St. Louis, State of Missouri, have invented 5 certain new and useful Improvements in Crushers, ofwht'rchthe following is a specification.

This invention relates to certain newand useful improvements in crushers provided with rotary pivoted hammers, the peculiarities of which will be hereinafter fully described-and claimed.

The main' object of my invention is to provide a crusher-with a rotary pivoted hammer that has a heavy head with a large amount of wearing surface, and which head is reversible so as to present four operative edges; secondly to adjust such a head outwardlly as it wears; thirdly, to protect the 20.. yoke from wear, so that the head only need be renewed;,fourthly, to provide a hammer mount, in the rotor that will allow the hammers to turn backward on their pivots and afford large clearance between the cage and the heads.

In the accompanying drawing on which like reference letters indicate corresponding parts, Fig. 1. represents avertical sectional view inside the casing and across the shaft of a crusher exemplifying my invention; Fig. 2, a vertical sectional view of such a machine along the shaft, showing one setof hammers in edge View; Fig. '3, an enlarged detail end view of my rotor head on the shaft in section with hammers carried thereby in several outward adjustments; Fig. .4, a detail side view of my hammer head; Fig. 5, a central section of said head as taken on a radial plane through the pivot axis; Fig. 6, an end view of said head; Fig. 7. a plan view of said head; Fig. 8. a side and plan view .of filler strips forming adjusting means for the head; Fig. 9, a side view of the said strips arranged for the first outward adjustment of the head; Fig. 10, a similar View showing the strips arranged for the second outward adjustment; Fig.

11, a side view of the divided yoke; and Fig. 12. an end view of the same.

The letter A designates a suitable casing for a crusher in which is mounted a cage B concentric with a shaft C on which are mounted a series of rotor heads provided with a plurality (preferably four) radiating CRUSHER.

1922. Serial No. 560,786.

arms D, in the outer ends of which are holes E for hammer rods F by which rotary pivoted hammers are carried on'said rotor head. This head is rounded at each end of the said arms and the space between the arms forms 'a reentrant angle to receive the backward movement of the 11ammers under the resistance of the material.

as indicated by the dotted lines in Fig. 3.

The hammers mounted on said hammerl.

of the arms D of the rotor head and in the construction shown, each arm has a hammer rod F upon the ends of which the eyes G are mounted and secured thereon by cotter ins I or otherwise. As'the projections If in operative position have their ends adjacent to each other, the. shanks present theappearance of a divided yoke as shownin Fig. 11. 1

Connecting these shanks and forming a heavy headfor the hammer, is a block J,

preferably rectangular and oblong in the axial direction and having at each end a recess that preferably form a continuous lengthwise opening K in the central lengthwise axis' of theblock. The alined projections H of the divided yoke are engaged by the walls of this central opening or end recesses and the shanks are also engaged .by the walls of end slots L that extend from top to bottom preferably as shown in Fig. 5 and Fig. 6. and lie in the same 'radial plane through the pivot axis. The shanks are preferably square and the projections H are square or angular, and the slots L are likewise square or angular, and the shanks engaged by the slots L are practically hidden therein and protected from wear by the material being crushed.

The central opening K has a greater radial depth than that of the projections H, preferably, so that the extra space is filled by strips M M through the center of which pass a connecting pin N which is located in the space between the alined projections H and maintains the filler strips in their central position. In the first assembling of nah the hammers these filler strips are located radially inward with regard to the alined projections as shown in Fig. 2. When the.

head is worn somewhat and it is desired to adjust the head outward, the strip M for instance, is located on the outer side of the in Fig. 3, at the bottom.

Referring to Figs. 1 and 2, the rotor heads are mounted on the shaft C so that the arms of the middle head for instance are opposite the spaces between the arms of the adjacent heads as indicated by shade lines in Fig. '1. This causes the hammers to alternate when arranged in the rotor as shown, whereby an im roved action is obtained upon the material entering the hopper and the material is drawn in more readily thanwhen all of ,t the hammers are arranged in lines parallel 'to the shaft and present a long operative edge instead of an alternating edge. This is the preferred arrangement, but they may be otherwise disposed if desired.

The shank eyes G are sessile, the balance of the shank in each case being hidden in the corresponding slot and recess of the head block, so that the outer circumference .of'the eye is substantially tangent to the inner face of the head block. The ends of the arms D are also rounded according to the eyes, so as to afi'ord clearance for the blocks inner face .closely adjacent to the end-of the arm. Thesides of adjacent arms form a reentrant angle and allow the head block to turn into this space and hit the side of the block against the side of the arm, so that the operative edges are not injured. Dashed lines in Fig. 3, indicate the osition of the upper hammer when thrown liackward as just described so that the side of the head block impinges on the side of the arm. I

The open end slot L, extending from the outer to the inner faces of the block, allows turning the'block and inserting the shanks from either direction. This reversing of the head brings the inner edges to the out side, and turning the block end for end brings the rear edges to the front. Thus all four. longitudinal edges can be successively used as the front outer operative edge of the hammer.

Iclaim:

1. A crusher comprising a rotary pivoted hammhr consisting of a reversible oblong block head having a multiple of operative faces, and having therein a central longitudinal angular opening with an open slot at each end extending from" top to bottom across the same and communicating with said central longitudinal opening, and a divided oke adapted for pivotal mounting consisting of shanks adapted to fit in either top'or bottom ends of said slots and having angular end projections fitting said length wise opening in the head, substantially as "described.

pivotal mounting at one end and having alined projections forming the divided yoke at the other end disposed in said longitudinal opening of the head, and spacing strips mounted in said longitudinal opening and perforated midway and a connecting pin located in said midwayperforations, substantially as described.

4. A crusher comprising a rotor head with radiating arms, rotary pivoted hammers mounted on said arms, andhaving heavy block heads and shank eyes,the outer cireumference of which eyes being substantially. tangent to the inner face of said head and the eyes being spaced apart the length of the head,the ends of said arms being located closely adjacent to the inner face of said headand rounded to give clearance of the head to recede into the reentrant angle space between adjacent arms, substantially as shown and described.

for the side of the hammer and avoid the operative edges.

In testimony whereof I have affixed my signature.

HARGLD M. PLAISTED. 

